As of today (2022-05-09), there is a fixup that will actually address the prior update (v1.9.14 Build 58) fix to PoTree model viewing.
WebODM for Windows native users, please update immediately the below release:
WebODM Manager users (MacOS and Windows [legacy]) and Docker users can update as per usual.
Any models processed in the past two days might need to be re-processed to show up as they were generated in a format that is too new for PoTree to render (at the moment). Subsequent models from this point on should always display properly.